Once upon a time, there was a little girl named Sally. Sally loved to mix colors. One day, she found a big, expensive box of paints. She was so happy! Sally opened the box and saw many colors. She saw red, yellow, green, and blue. She wanted to make a new color, so she mixed blue and yellow. Guess what? She made green! Sally painted a beautiful picture with her new green color. She showed her mom and dad. They were so proud of her. The expensive paints helped Sally make a pretty picture for everyone to see. And that made Sally very happy.